201221021302313 has 8 divisors (see below), whose sum is σ = 202690836697032. Its totient is φ = 199751221108096.

The previous prime is 201221021302303. The next prime is 201221021302339. The reversal of 201221021302313 is 313203120122102.

It can be written as a sum of positive squares in 4 ways, for example, as 73952208605209 + 127268812697104 = 8599547^2 + 11281348^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201221021302313 - 2⁸ = 201221021302057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201221021302303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23485031 + ... + 30886707.

It is an arithmetic number, because the mean of its divisors is an integer number (25336354587129).

Almost surely, 2^{201221021302313} is an apocalyptic number.

It is an amenable number.

201221021302313 is a deficient number, since it is larger than the sum of its proper divisors (1469815394719).

201221021302313 is a wasteful number, since it uses less digits than its factorization.

201221021302313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7600251.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 201221021302313 its reverse (313203120122102), we get a palindrome (514424141424415).

The spelling of 201221021302313 in words is "two hundred one trillion, two hundred twenty-one billion, twenty-one million, three hundred two thousand, three hundred thirteen".